Her setup sounds grand tbh. I think you might be right that she just wants more space. I personally wouldn't go detolf unless you can manage a raised lid or something because it's v easy for them to chew the mesh instead now she's got the habit.
The Linnmon hacks are a bit more work and need more tools but you end up with a much better cage and it's still manageable. And there's a great distance to the mesh so no chewing opportunities. If you can't manage that the detolf is still a good upgrade tho! And I've moved 3 times with mine. I kept the box stuffed down the side of a wardrobe with the spare panel so everything just gets unassembled and put back in there. No breakages and only one near miss
As a quick thing you can give her a ton more bedding if you block the bottom of the bars with cardboard strips or corrugated plastic board or anything really. Then you can pile it in there without it falling out all over the place and as a bonus it might block where she normally chews.